Watch: Wisconsin Capitol police tackle man for photographing progressive protest

A photographer and activist was aggressively arrested at the Wisconsin Capitol on Monday during a daily singalong protest.

Video of the incident uploaded to YouTube showed two police officers approaching Damon Terrell, who can be heard saying, "This is not illegal." As Terrell backed away, one of the officers grabbed him. Terrell ended up on the ground with three officers on top of him.

Another video uploaded to YouTube showed four officers carrying Terrell out of the rotunda by his arms and legs.

Christopher J. Terrell, Damon's brother, was also arrested for participating in the “Solidarity Sing Along" demonstration in the Capitol.

"The brothers have had a history of demonstrating and arrests by the capitol police, at times that has involved the brothers shouting at officers," said Michael Phillis of the Wisconsin-Milwaukee Journal Sentinel.

The daily demonstrations began during the 2011 budget protests. A judge struck down portions of the Walker administration's restrictions on demonstrations in July, but groups of more than 20 people still require a permit to demonstrate.

Earlier this month, a Wisconsin lawmaker and a state official were both threatened with arrest for merely observing the demonstration.

Watch the videos, uploaded to YouTube, below:

[Note: Updated for clarity.]